Not once did anyone in the supposedly Jewish side of his family point out that he had a SS tattoo on his chest?
I'm Jewish, if I saw that on his chest I wouldn't have any idea what it means. How could I inform him of his mistake if I didn't know. And if I did know I would have been steering clear of him, not talking to him about his tattoo.
Honestly not enough context here to answer. Are they a former close friend, distant aquintence, former love interest? Do you have a pattern of long period of time with no catch up? A lot of thing in relationships are contextual based on set expectations.